Detachable choke piece



July 3l, 1928. 1,679,048

` R. w. MILLER DETACHABLE CHOKE PIECE Filed Feb. 4, 1927 Patented July 3l, i928..

RANsn WRIGHT MILLER, or DUBLIN, GEORGIA.

DETACHABLE HOKE PIECE.

Application iiled February 4, 1927. `Serial No. 165,967.

I i rlhis invention relates to detachable choke-pieces for attachment to the barrels of shot-guns and the like, and has for its primary object the provision of a device of this character which is extremely simple of construction 'and may be easily and quickly associated with and locked fast to the barrel of a gun in such manner that there are no CII ' movable projecting parts to engage and be- Colne fast in hanging limbs, brush or shrubs as the hunter travels.

inventive-concept contemplates the structural modifica-tion of a gun barrel to provide means for associating the chokepiece therewith, the provision of a sleeve of novel construction for connecting the choke- .piece to the barrel, and the provision of locking means upon the bairel for engagenient with the sleeve to 'lock the latter in fixed operative position on the barrel, as welll as the provision of a choke-piece vdesigned, when associated with the barrel, to concentrate the shot leaving the gun into a smaller area at a distance from the gun than is possible with a cylinder-bore or openbarrel gun. d y y lVith these 'and other objects'in view, as will become` apparent as the description proceeds, the invention may be saidto consist of the no vel features of construction, combinations of'elements and Aarrangements of parts hereinafter to befullydescribedand pointed out in the claims..`

A'full' and complete understanding of the invention may be obtained from a consideration' of thel following detailed description, taken in connection with the accompanying Vdrawings forming a part of the disclosure, it being understood that while the drawings show a practical forni of the invention which has proven satisfactory in use` the latter is not confined to the showing thereof but may be changedvand. modified so long as such changes and modifications' mark no m'a-l terial departure from thesalient features of the invention as hereinafter fully described and claimed.

In these. drawings Figure'l is a view in side elevation of al portion of a shotgun barrel, modified, andi having operativelyassociated therewith the sleeve, choke-piece and locking-element, in4

` accordance with my invention;

Fig, 2 is a view in top plan ofthe structure shown'in Fig `1; Y

Fig'. 3 isla view, in perspective, of a porand quickly 'asso tion of the gun barrel, shown in Fig. l, with the sleeve and choke-piece removed;`

Fig. l is a similar 'view of the associated choke-piece and sleeve, a` portion of the sleeve being cut away and portions thereof shown in section, 'to illustrate the `interior construction of the sleeve;

Fig' is a view, in vertical section,` taken on line 5.-75 of Fig. 3; A Fig. V6 is a .similar view, taken on line 6 6 of Fig. 7; and i f Fig. 7' is a view in longitudinal central section of thel sleeve.

in the particular embodiment of the invention illustrated in' the acc'ompanyingv drawings, the reference-character l desigvcase if the shot were permitted to travel in the direction which they take when leaving the cylindrical bore 2 'of the4 barrel. other times,it is desirable to` permit the shot to spread over a widearea as they do when issuing' from the cylindrical bore. In order Athat the h'untermay be able to quickly adapt the gun either to spread or to concentrate the shot, lit isl essential that shot-concentrating ineansbeprovided which may beaccuratcly ciated with' the Abarrel and locked thereto. l' y ',To this end, as shown, the barrel 1 has formed thereon, .adjacent-its end, threads 4 designed to coact with threads 5 on the interior of a hollow cylindrical sleeve 6 to position the klatter on' i the barrel in longitudinal alineinen't therewith. vThe threads Il do not extend entirelyy around the barrel l but are provided only on opposite` sides Ithereof andare spaced or interrupted to produce opposed guideways 7 equal in depth to the height of the threads and slightly wider' than the threaded portions 8.

The sleeve 6 isv interiorly threaded from vendtov en'd and portions of the threads ad ja'centthe inner end thereofare cutaway to provide opposed guideways ll() Vequal in depth to the height of threads 5 and slightly wider than the resulting spaced threaded portions ll.

By reason of this construction, it'is possible to aline the threaded portions 8k`and 1l v with theguidewajysrV andr 7, respectively,

' vreception otvtlie Vsight 113which, invthis -in- 5 and ,to slide thev sleeve into telescopic relation tothe barrel, whereupon a quarter turn' of the sleeve with respect to the barrel enr-VV gagesthe threads 8 ot the barrel with the threads v11 of the sleeveand the guideways 7 and lO'coincide` Y .Y

The inner end 9 of the sleeve 6 has a portion of the upper side thereof cut away to provide arrectangular opening 12 for the stance, is carried by a substantially rectangular block. 14 fast in the usual position to the barrel. 1 -The'opening- 12 vis so posi-v tioned with respectto the threaded portions 11 and .guidvewa-ysl 10 and is otsuch asize that it serves in conjunction witli'the block to materially aid in the assembling of the.

` sleeve with the barrel in a manner about to be described. v l

To assemble the sleeve l6 with the barrel 1, the end 9 ofy the sleeve is telescopically positioned upon the unthreadedend v1570i? bordering vthe vcut-out 12, is in alinement g withsidel 17 of the sight block 14 which ac.- i tion,bvjrreason of the location ot the cutout with `respect to the threaded portions 11 andguideways 10, brings V'guideways 10 into alinement with-the threaded portions 8 on theY barrel and(r threaded portions 11 into'V p alinemeiitY withvguideways 7, so that the sleeve .maybe moved inwardly upon the barrel until' the edge '18 'engages the :forward edge 19 of the sight block 14. f The sleeve isthen rotated in a clockwise direction upon the barrel until edge 20v thereof engages side `21A of'ythe sight block, 4which action brings 'the threaded portions 11y intov exact register andengagement with the respective threadied portions 8 andthe guideways 10 into tive rotative motion of the sleeve "and ,bar-v register Awith the respective Vguideways 7 Preferably and asshown, y.means for locking the sleeve inoperative position on the barrel is provided and, in this instance, comprises a split circular spring band 22 yield-V inglyfengaging and slidable upon the barrel in 'rear of the sight`block14 and having j a "pair of forwardly extending locking tongues' or key-s 23 engageable in the respective guideways 7 to positively prevent relarel; As sliown,the-band 22 has projections 24 formedthereon `in rear of the keys 23 to.:

serve as handles for use in manipulationof` the band to and from loclringfpositionj It `will-be observed ,that the l ends 24V ofathe spring band22 are spaced aparta distance approximately equal to the-Width of the sight block '14 and engageopposite sides f thereof when the band is in lock-ing position.

As liereinbetore stated, ther-'sleeve 6 is interiorly threaded vfromrend to end and the threads 5 'at the end 25,remot'e from the Ycut-out or opening 12, are uninterrupted the barrelandvrotated'thereon until edge16,V

AI have provided l tive movement barrel; f p

and engage with threads 26 provided ,on the fexterior ot a choke-piece 27 to assemble the latter' therewith. VIn order that the inner the end 3 'of thebarrelwhen operatively as- .end 28 of the choke-piece shall snuglyabut sociated therewith, it isl desirable to screw.

it tightly into thek sleeve when the latter isY locked to the 'barrel-v and then more permanently secureit in this position asby means of a set screw 29 threaded from the VexteriorV of the sleeve through the latter and into-the choke-piece.

1 lihe choke-piecel 27, as shown, icon iprises'. a .cylindrical-portion Y30 equal in diameter to 'the'barrel land having abore 31 equal in diameter to-'the bore `2 and a Vportion V'3,2 which is also, preferably, cylindricalv externally.

soVK

As best shown inA broken vlines'in Y Fig. 1, the bore 31. tapers or decreases slighty lyindiameter toward the forward end 33 of the Achoke-piece in order that theV wall thereof will direct thek shotY as desired, Obviously,.the choke-piece .27 `may haveany desired degree of internal taper and afplurality of choke-pieces differing as to bore may be selectively associated withy the sleeve' 6 as the occasionV demands.V Itis to be under-Y stood that, attent-he choke-piece has/once been adjusted tothe sleeve and to the bari 1 relot a particular gun, the sleeve and chokepiece are then handled `as', a unit and'locki ing of thesleeveto-'the barrel in proper position also secures thechoke-piece in operative position. y l Y Y Y From the foreeoing,V it will be seen vthat ,a choke-pieceA assembly which may be quickly and easily' associated therefrom'. i' What'I'claimvis'f y 1.l vIn combinatioma or the like, and 'may beas readilyreinoved shot-gun ',Ybarrel hav- X with and locked'to the barrel of a' shot-gunY .Y Y

ingvinterrupted 'threads formed thereon, a

sleeveslidable on the kbarrel and having'interruptedv threads thereon for engagement with thethreads on the barrel, means* slidlio able on thebarrel for engagement withthe Y threads on the rbarrelfforlocking the barrel fand sleeve fagainst relative rotative movementA` vand a choke-piece carried'bythe sleeve.

"2.7111 combinatiomfa shot-gun barrel, a sleeve slidablep'vonto'the end of thefbarrel, coacting means on the barrel andsleeve for preventingV relative; longitudinal movement ofthe sleeve and barrel, andV means coactng with the irst-named'ineans to prevent rotar of the sleeve relative to4 the l3. In combination, a shot-gun barrel, a'A vsleeve slidable onto the end of the barrel, a

movement of the sleeve relative to the barrel.

4. In combination, a shot-gun barrel, a sleeve, coacting threads formed on the barrel and sleeve for removably associating the sleeve in telescopic relation to the barrel, a portion of said threads being cut away to y provide a guidevvay, a locking member slid- 'able on the barrel and including a key for engagement in the guideWay to lock the barrel and sleeve against relative longitudinal or rotative movement, and a choke-piece carried by the sleeve.

5. In combination, a shot-gun barrel, a

' sight block carried bythe barrel, interrupted threads on the barrel positioned in predetermined relation to the. sight block and providing` guideways between groups of threads, a' sleeve slidable upon the end of the barrel and having interrupted threads for coaction with the threads on the barrel, said sleeve being formed With means for alinement with an edge of the sight block to bring the threads of vthe sleeve into register with the guideways to permit sliding of the sleeve onto the barrel to bring the threads of the barrel and sleeve into alinement and rotating of the sleeve on the barrel to cause coaction of said threads, and means movably carried by the barrel and movable into the guideways to lock the sleeve in position on the barrel.

6. In combination, a shot-gun barrel, a sight block carried by the barrel, interrupted threadsA on the barrel positioned in predet termined relation to the sight block and providing guideways between groups of threads, a sleeve slidable upon the end of the barrel and having interrupted threads for coaotion With the threads on the barrel, said sleeve being formed with means for alinement With an edge of thev sight block to bring the threads of the sleeve into register With the guideways to permit sliding of the sleeve onto the barrel to bring the threads of the barrel and sleeve into alinement and rotating of the sleeve on the barrel to cause coaction of said threads, means movably carried by the barrel and movable into the guidevvays to lock the sleeve in position on the barrel, and a choke-piece carried by the s eeve.

v 7. In combination, a shot-gun barrel hav-f ing interrupted threads formed thereon, a sleeve slidable on the barrel and having interrupted threads therein for engagement With the threads on the barrel, and means slidable on the barrel for engagementvvith the threads for locking the barrel and sleeve against relative movement.

8. In combination, ashot-gun barrel, a sleeve, coacting threads on the barrel .and sleeve for removably associating the sleeve in telescopic relation to the barrel,.a portion of said threads being cut away to provide a guidevvay, and a locking member slidable on kthe barrel and including a key for engagement in the guideway to lock the barrel and sleeve against relative movement. n

In testimony whereof I aix my signature.

RANSE WRIGHT MILLER. 

